Korean J Lab Med.  2009 Oct;29(5):390-395. 10.3343/kjlm.2009.29.5.390.

Two Cases of Acute Myeloid Leukemia with t(16;21)(p11;q22) and TLS/FUS-ERG Fusion Transcripts

  • 1Department of Laboratory Medicine, Ajou University School of Medicine, Suwon, Korea. sungran@ajou.ac.kr
  • 2Department of Hematology-Oncology, Ajou University School of Medicine, Suwon, Korea.
  • 3Department of Medical Genetics, Ajou University School of Medicine, Suwon, Korea.
  • 4Department of Pathology, Ajou University School of Medicine, Suwon, Korea.


Many AML-associated chromosomal abnormalities, such as t(8;21), t(15;17), inv(16), t(9;11), t(9;22) and t(6;9) are well known. The chromosomal aberration of t(16;21)(p11;q22) in AML is rare and it is known to be associated with poor prognosis, young age (median age, 22 yr), and involvement of various subtypes of the French-American-British classification. We report here 2 AML patients with t(16;21)(p11;q22), proved by conventional cytogenetics and/or reverse transcription (RT)-PCR. Erythrophagocytosis by leukemic blasts was observed in both of the cases. One patient was a 24 yr-old male with acute myelomonocytic leukemia. His karyotype was 46,XY,t(16;21)(p11;q22),del(18)(p11.2) and RT-PCR revealed the TLS/FUS-ERG fusion transcripts. Although he received allogeneic peripheral blood stem cell transplantation after the first remission, he died 9 months after the initial diagnosis due to relapse of the disease and graft-versus-host disease. The other patient was a 72 yr-old male with acute myeloid leukemia without maturation. His karyotype was 45,XY,-16,add(21)(q22) and the presence of t(16;21)(p11;q22) was detected by RT-PCR. He was transferred to another hospital with no more follow-up. We suggest that the presence of t(16;21)(p11;q22) and/or TLS/FUS-ERG fusion transcripts has to be considered in cases of AML with erythrophagocytosis.


Acute myeloid leukemia; t(16;21)(p11;q22); Erythrophagocytosis; TLS/FUS-ERG

MeSH Terms

Chromosomes, Human, Pair 16/*genetics
Chromosomes, Human, Pair 22/*genetics
Graft vs Host Disease/diagnosis
Leukemia, Myeloid, Acute/diagnosis/*genetics
Oncogene Proteins, Fusion/*genetics
RNA-Binding Protein FUS/*genetics
Reverse Transcriptase Polymerase Chain Reaction
*Translocation, Genetic
Young Adult
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